20166670017 has 12 divisors (see below), whose sum is σ = 31370375764. Its totient is φ = 12410258400.

The previous prime is 20166670003. The next prime is 20166670037. The reversal of 20166670017 is 71007666102.

It can be written as a sum of positive squares in 2 ways, for example, as 3735532161 + 16431137856 = 61119^2 + 128184^2 .

It is not a de Polignac number, because 20166670017 - 2⁶ = 20166669953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20166670037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86182234 + ... + 86182467.

Almost surely, 2^20166670017 is an apocalyptic number.

It is an amenable number.

20166670017 is a deficient number, since it is larger than the sum of its proper divisors (11203705747).

20166670017 is a wasteful number, since it uses less digits than its factorization.

20166670017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172364720 (or 172364717 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 20166670017 in words is "twenty billion, one hundred sixty-six million, six hundred seventy thousand, seventeen".